Hello, My name is Inisdel and  I want to shere with you my ideas.
As I did on previous "Kakao forum" I would like to suggest some concepts I would like to see in future in BDO.

Intro
Why I do this? Because I think and I believe there are many ppl who want little bit more from PvP (not only RBF, Castle Siege and Battle Arena, sometime Arsha grind kill PvP event). But first, let me mention some notes from developers which was not developed yet and I hope they don't forget what they promissed.

Word from the developers about PvP posted Nov 6, 2019 (kakao forum).
"We wanted to provide a PvP environment that is free from excessive competition. This is why we updated the game with Team Battles in which multiple players can team up together and also allowed players to have the opportunity to join the Battle Arena at anytime from anywhere via teleport (though this travel method is not as per our original direction of the type of game BDO is supposed to be like). However, if the adventurers really want it, we will seriously consider implementing 1v1, 2v2, 3v3, etc. matches and also consider implementing a ranking system. If this really happens, we will focus on making sure that the rewards are not the sole goal and purpose of this system. Instead, we will focus on making this system a fair competitive system, with emphasis on making "honor/fame" the main goal of the adventurers.,,

My Ideas
1v1 - "Lineage 2 olympiad style"
- ranked system with leaderboard
- BO3 elimination
- with your gear
- simple arena (like Arena of Arsha)
- matchmaking every evening (concentrate players to one time window)
- instanced matchmaking (but not what devs did in battle arena, this was joke, I am sure)
- each class can fight agains every other(or same) classes
- leaderboard is ranked per classes
- every month is selected one hero per class (1st rank)
- special benefit for next month
Cons: unbalanced, gear dependant (but in this mode I'm ok with it, cuz hero should be the strongest one - gear and skill, both counts)
Pros: competitive, more funny alternative to duels

I know, the game is not build for 1v1 and each class is not balanced to others, but ranking per each class is way how to workaround the problem (Balance is not solution, the game will never be balanced in this direction). 
 
3v3 - "Ranked Arenas"
- ranked system per registered team
- BO3 elimination
- leaderboard with ELO system
- matchmaking/instances
- multiple maps/arenas
- unique classes team restriction
- gear balanced (trial characters or new concept of balance)
- pre-league matching for futured Championships (best teams from specific period will be promoted to the tournaments)

Cons: less interest (lower player base), unbalanced (metas will born but without devs interest and balance it can stuck on same place forever)
Pros: small scale fights

10v10 - "crew battles"
Already announced "Additionally, new 10 v 10 PVP “crew battles” are planned for early 2021. " link

But, I am not sure if they will develop something good (I'm skeptical to this, cuz Devs promised good PvE instance content in past and what we got - Altar of blood or Savege Rift ^^, They was talking about PvP for years and what we got - Battle Arena with small arena inside and corrupted matchmaking without instances ). 

- 10 v 10 matchmaking (total 13 players in crew, 3 substitute)
- ranking system, leaderboard, ELO
- concept similar to Guild Wars 1 GvG (old players may remember)
- multiple maps with different mechanisms (catapults, flag with boost, split ways)
- 2 bases/small castles with "lord/item to be destroyed inside)
- when Lord dies (item is destroyed) match is finished
- dying prolong respawn time
- match up to 45mins (after this period Lords will go to the middle)

Cons: possible disinterest in this content
Pros: small guild can compare their strength

Don't you like the idea? Post me why.
Do you like this idea? Share! Like it, Better chance that Devs will see it.

They need to add a "balanced" system to make PVP fair (no CC resists, good amount of AP and DP to avoid OP trial classes such as Nova succ with DP buffs...) in arena. I really like your rewards for 1v1 and it could definitely be a good addition. 

Imagine 10v10

like:

-1shai

-1grab bot

-8wizzards

Sounds fun lul...

Funny because true 

Wow you was able to mention Wizard without lumping Witch in the same boat. I'm actually impressed with you.

unfortunately, PA is working on this type of pvp (13 members in crew, 3 substitutes, 10 attenders). 
Maybe they will implement some kind of duplicite class restrictions.  However last valid pvp of similar size (if I remmeber correctly it was 8v8) - Guild vs Guild in Guild Wars 1 :). 

And for who?
Like at top hours there maybe 3 rbf going, so what? How many 10 man teams will be active at a given time? 2? 5? Probably less than 10 at peak hours.

The number of active players in bdo is low.

The number of PvP players is even lower.

And the number of geared ones are much lower.

So who will play? There will be probably one, or at most two team that will farm the whole roaster and dodge the other, seems like a healthy, competitive scene /LMAO

Maybe if they will put shittons of rewards like how they did with SA, people will start doing that instead of grinding, but othervise it sounds pretty DOA.

I would be surprised if there would be certain people who would boost others for IRL cash, or if "accidentaly" one player from the 10 would be a hacker on a throwaway account :)))))

Even much larger game like wow barely can handle 5v5, surely there will be competitive 10v10....

hah, no.

At most 2v2 and 3v3 would have some legitmity with such playerbase.